Implement Snackbar notification for Notes Deleted

[vladikoff]

For Delete and Synced

We should be able to use this: github.com/callstack/react-native-paper/pull/305/files

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[vladikoff]

Material design spec for this: https://material.io/guidelines/components/snackbars-toasts.html#snackbars-toasts-usage

[vladikoff]

Some logic landed here: #973

We need to add another "Delete Undo" Snackbar into the view with different colors and and an action button:

+          action={{
+            text: 'Undo',
+            onPress: () => {
+              this.setState({ visible: false });
+            },
+          }}

[vladikoff]

Also the Sync snackbar currently doesn't have number of notes synced